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Center for Education and Research in Information Assurance and Security

John Oritz, SRA International

John Oritz - SRA International

Nov 12, 2008

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Steganography is a discipline of computer science whose aim is to conceal the existence of information. Steganography synergizes various technologies including data compression, digital signal processing, information theory, data networks, cryptography, coding theory, and the human audio and visual system. Strap on your seatbelt. I will present some key concepts of steganography, describe a number of basic and advanced spatial and transform domain techniques (with lots of pictures and sounds for the “attention-challenged”), and demonstrate these techniques using custom steganography software. The demonstrations include a Least Significant Bit (LSB) technique, High-Capacity Hiding in Jpegs, and time modulation in audio.

About the Speaker

John Ortiz is currently a senior computer engineering consultant for SRA International. In this position he researches information hiding techniques and steganography software, assesses the security and feasibility of advanced DoD security applications, examines and deobfuscates malware, and develops forensics tools. Prior to SRA, he spent 5 years at General Dynamics developing source code and network traffic analysis techniques and software.

In a second role, Mr. Ortiz teaches a variety of computer science and electrical engineering courses at the University of Texas at San Antonio (UTSA). In particular, he developed and still teaches a Steganography course, which covers a broad spectrum of data hiding techniques in both the spatial and transform domains. For his course, Mr. Ortiz personally developed several steganographic programs for testing and analysis.

Mr. Ortiz holds two master’s degrees from the Air Force Institute of Technology, one in computer engineering and one in electrical engineering and a bachelor’s degree in electrical engineering from Rose-Hulman Institute of Technology.

Unless otherwise noted, the security seminar is held on Wednesdays at 4:30P.M. STEW G52 (Suite 050B), West Lafayette Campus. More information...


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